body{
    background-image:url("../Circle img/bg.jpg");
}
.img{
    width:900px;
    height:500px;
}
.a1 {
    background-image: url("../Circle img/1.jpg")
}

.a2{
background-image: url("../Circle img/2.jpg");
}

.a3{
background-image: url("../Circle img/3.jpg");
}


.a{
    width: 220px;
    height: 220px;
    border-radius: 250px;
    box-shadow:inset 0 0 100px #ffffff;
    float: left;
    margin-left: 70px;
}
.aa{
    width: 220px;
    height: 220px;
    border-radius: 250px;
    background-color: rgba(63,147,147, 0.8);
    margin-bottom: 50px;
    overflow: hidden;
    display: none;
    opacity: 0.8;

}